Modular control device and nondestructive testing accelerator

Abstract

A modular control device is provided for controlling an outer collimator of a non-destructive testing accelerator. The modular control device includes: a bottom plate unit including a bottom plate; the control unit is mounted on the bottom plate; the N motor power units are mounted on the bottom plate, each motor power unit is used for driving at least one motor of the outer collimator in response to a signal of the control unit, and N is an integer greater than or equal to 1; wherein the control unit and the motor power unit are modularized units which are mutually independent. The invention further provides a nondestructive testing accelerator.

Description

Technical Field

[0001] The present disclosure relates to the field of non-destructive testing, and more particularly, to a modular control device and a non-destructive testing accelerator. Background Art

[0002] When performing nondestructive testing of X-rays, in order to ensure the clarity of the film image, it is necessary to reduce or prevent the scattering of X-rays and shield the X-rays in non-testing areas. An external collimator is usually used to limit the irradiation range to a certain area, which is called the irradiation field.

[0003] Electron linear accelerators for non-destructive testing usually use external collimators to adjust the irradiation field. The collimation block of the external collimator is usually made of materials that have a blocking / absorbing effect on X-rays. Through the structural design of the collimation block and the control of the state parameters of the collimation block, part of the X-rays can be blocked while allowing the other part of the X-rays to pass, so as to adjust the irradiation field to achieve the purpose of collimation.

[0004] In the related technology, the control unit currently uses an integrated circuit, and the main control chip and the motor driver chip are integrated in a circuit board plane. The motor driver chip will have a heating problem after long-term use. The heating of the driver chip will not only affect the drive of the motor, but also transfer the heat to the main control chip, affecting its performance and life. Various circuit components in the control unit will also be damaged to varying degrees due to long-term exposure to X-ray scattering, and troubleshooting and replacement become time-consuming and labor-intensive. The most commonly used troubleshooting method is to replace the entire control unit, which is wasteful. Summary of the invention

[0005] In view of the above problems, the present disclosure provides a modular control device and a nondestructive testing accelerator.

[0006] According to a first aspect of the present disclosure, a modular control device is provided for controlling an external collimator of a nondestructive testing accelerator, characterized in that the modular control device comprises: a base plate unit, including a base plate; a control unit, mounted on the base plate; N motor power units, mounted on the base plate, each of the motor power units being used to drive at least one motor of the external collimator in response to a signal from the control unit, where N is an integer greater than or equal to 1; wherein the control unit and the motor power unit are independent modular units.

[0007] According to an embodiment of the present disclosure, the base plate unit also includes: a connector installed on the base plate; wherein the control unit and the motor power unit are independent modular units including: the control unit and each of the motor power units are respectively pluggably installed on the base plate through matching connectors.

[0008] According to an embodiment of the present disclosure, the control unit includes: a control chip provided with at least one first interface, wherein the first interface is used for transmitting input and output signals between the control chip and the outside.

[0009] According to an embodiment of the present disclosure, the baseboard unit also includes: a first circuit, laid on the baseboard and connected to the at least one first interface; a first terminal, arranged on the baseboard and connected to the first circuit, wherein the first terminal is used to connect to part or all of the external input and output signals.

[0010] According to an embodiment of the present disclosure, each of the motor power units includes: M motor driver chips, each of which is used to drive at least one motor of the external collimator, and M is an integer greater than or equal to 1; each of the motor driver chips is provided with at least one second interface, and the second interface is used to transmit the signal of the control unit, and the motor driver chip is used to drive at least one motor of the external collimator in response to the signal of the control unit.

[0011] According to an embodiment of the present disclosure, the base plate unit further includes: a second circuit, which is laid on the base plate, and the second circuit is used to transmit the signal of the control unit to the second interface.

[0012] According to an embodiment of the present disclosure, each of the motor power units further includes: a phase excitation dial switch coupled to the M motor driver chips, and the phase excitation dial switch is used to select a matching phase excitation mode according to the motor driven by each motor driver chip.

[0013] According to an embodiment of the present disclosure, each of the motor power units further includes: a motor interface connected to at least one motor of the driven external collimator; a motor ground wire connected to the motor interface, and a specific area on the motor ground wire is covered by electromagnetic shielding material.

[0014] According to an embodiment of the present disclosure, the base plate unit also includes: a first power supply, installed on the base plate, for supplying power to the control unit; N second power supplies, installed on the base plate, for supplying power to the N motor power units one by one; wherein the first power supply and any one of the second power supplies are isolated from each other and wired in layers, and / or any two of the second power supplies are isolated from each other and wired in layers.

[0015] According to an embodiment of the present disclosure, the baseboard unit also includes: a third power supply installed on the baseboard, used to power the input and output interfaces on the baseboard; a fourth power supply installed on the baseboard, used to provide overall power supply to the modular control device; wherein the first power supply, the second power supply, the third power supply and the fourth power supply are isolated from each other and wired in layers.

[0016] According to an embodiment of the present disclosure, the modular control device also includes: an operation box, which is independent of the external collimator; the operation box is configured to transmit data with the control unit in the form of a serial data bus in response to being operated by a user, and the control unit is configured to generate a signal for controlling the external collimator in response to the data.

[0017] According to an embodiment of the present disclosure, the operating box includes: a laser switch, wherein when the laser switch is operated by the user, the control unit is configured to generate a switch signal corresponding to a calibration laser, and the calibration laser is used to calibrate the center point of the irradiation field of the external collimator.

[0018] According to an embodiment of the present disclosure, the external collimator includes S collimation blocks, the S collimation blocks are used to collimate rays, S is an integer greater than or equal to 1, and the operation box includes: a display area for displaying status parameters of each of the collimation blocks; and / or a button area, including K groups of buttons, each group of buttons including at least one button, wherein each of the collimation blocks has a corresponding group of buttons in the button area, and K is an integer greater than or equal to S.

[0019] According to an embodiment of the present disclosure, the modular control device further includes: a box body, wherein the base unit, the control unit, and N motor power units are installed in the box body; and a connecting cable for connecting the operating box to the box body.

[0020] Another aspect of the embodiments of the present disclosure provides a nondestructive testing accelerator, characterized by comprising: an external collimator; and a modular control device for the external collimator as described in any one of the above items.

[0021] One or more of the above embodiments have the following beneficial effects: by modularly designing the control device of the external collimator, each unit is split into independent modular units. Effective isolation is achieved between the control unit and the motor power unit to avoid mutual interference during operation, and fault location and subsequent maintenance and replacement can be achieved more conveniently and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0023] Figure 1 A schematic diagram of the three-dimensional structure of an external collimator for a non-destructive testing accelerator according to an embodiment of the present disclosure is schematically shown;

[0024] Figure 2The structure block diagram of the modular control device according to the embodiment of the present disclosure is schematically shown;

[0025] Figure 3 Schematically shows a structural block diagram of a base plate unit according to an embodiment of the present disclosure;

[0026] Figure 4 A schematic diagram showing the connection between a control chip, a first circuit and a first terminal according to an embodiment of the present disclosure is shown;

[0027] Figure 5 The structural block diagram of the motor power unit according to the embodiment of the present disclosure is schematically shown;

[0028] Figure 6 A schematic diagram of an opening of a motor power unit according to an embodiment of the present disclosure is schematically shown;

[0029] Figure 7 The schematic diagram schematically shows the connection between the control chip, the second circuit and the motor driving chip according to the embodiment of the present disclosure;

[0030] Figure 8 The functional layout diagram of the operation box according to the embodiment of the present disclosure is schematically shown.

[0031] The reference numerals related to the above drawings are as follows:

[0032] 100, external collimator; 110, mounting frame; 120, lead screw; 130, driving device; 140, collimation assembly; 141, first group of collimation members; 142, second group of collimation members; 143, collimation block; 160, guide rail; 171, transmission fixture; 172, sliding fixture; 181, main transmission wheel; 182, slave transmission wheel; 200, modular control device; 210, base unit; 211, base; 212, first terminal; 213, first circuit; 214, second circuit; 220, control unit; 221, first connector; 222, control chip; 2221, first interface; 230, motor power unit; 231, second connector; 232, motor drive chip; 2321, second interface; 233, phase excitation dial switch; 234, motor interface; 235, power supply interface; 236, level conversion circuit; 237, signal isolation circuit; 240, operation box; 241, laser switch; 242, display area; 243, button area; 250, box body.

[0033] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the sizes of the overall / local structures or the overall / local areas may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0034] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present disclosure. However, it is apparent that one or more embodiments may also be implemented without these specific details. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.

[0035] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0036] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0037] When using expressions such as "at least one of A, B, and C, etc.", they should generally be interpreted according to the meaning of the expression commonly understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but is not limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.).

[0038] Figure 1 The three-dimensional structural diagram of an external collimator for a non-destructive testing accelerator according to an embodiment of the present disclosure is schematically shown.

[0039] like Figure 1 As shown, the outer collimator 100 for a nondestructive testing accelerator according to an embodiment of the present disclosure may include a mounting frame 110, a lead screw 120, a driving device 130, a collimation assembly 140 and a bearing assembly ( Figure 1 (not shown) the external collimator 100 is arranged outside the accelerator and is used to collimate the outgoing rays of the accelerator.

[0040] The mounting frame 110 is used to support various components of the external collimator 100 . In the present embodiment, the mounting frame 110 is constructed as a substantially frame-shaped structure, and other components are distributed on the mounting frame 110 .

[0041] The lead screw 120 is rotatably connected to the mounting bracket 110 . The lead screw 120 is mainly used to drive the collimation assembly 140 to move, so as to adjust the irradiation angle of the collimation assembly 140 , that is, to adjust the irradiation field of the external collimator 100 .

[0042] The driving device 130 is disposed on the mounting frame 110, and the output end of the driving device 130 is connected to the lead screw 120 for driving the lead screw 120 to rotate. For example, the driving device 130 may be a stepping motor, and the lead screw 120 may be driven by controlling the number of steps and direction of the stepping motor to thereby drive the collimation assembly 140 to move to a specified position. In other optional embodiments, the driving device 130 may also be hydraulically driven, pneumatically driven, etc., and the distribution position of the driving device 130 may not be limited to the form shown in the drawings, as long as it can drive the lead screw 120 to rotate.

[0043] The collimation assembly 140 is located in the gap formed by the mounting frame 110 and is connected to the lead screw 120. The mounting frame 110 can protect the collimation assembly 140. The collimation assembly 140 is made of radiation shielding material. Under the driving action of the driving device 130 and the lead screw 120, the collimation assembly 140 can move along the lead screw 120 to shield part of the rays emitted by the accelerator, thereby adjusting the irradiation angle of the rays.

[0044] The bearing assembly is disposed between the lead screw 120 and the mounting frame 110, and is used to support the rotation of the lead screw 120. Specifically, the bearing assembly may include a bearing seat, a bearing, a positioning sleeve, and a fixing member.

[0045] like Figure 1 As shown, the mounting frame 110 is provided with a guide rail 160 and a lead screw 120 matched with each collimating block 143, and the guide rail 160 and the lead screw 120 are respectively mounted in pairs on the edge of the mounting frame 110. The external collimator 100 also includes a transmission fixture 171 and a sliding fixture 172. The collimating block 143 is mounted on the lead screw 120 through a pair of transmission fixtures 171 on both sides thereof, and the transmission fixture 171 is closely matched with the lead screw 120. The lead screw 120 bears the weight of the collimating block 143 through the transmission fixture 171 and drives the collimating block 143 to move. A pair of sliding fixtures 172 are respectively mounted on both sides of the collimating block 143, and each pair of sliding fixtures 172 is in close contact with a guide rail 160 between them, and the sliding fixture 172 can slide with the guide rail 160. During the movement of the collimating block 143, due to the action of the sliding fixture 172, it will strictly move along the track of the guide rail 160.

[0046] In some exemplary embodiments, the outer collimator 100 may further include a transmission device, which may include a main transmission wheel 181, a slave transmission wheel 182, and a transmission connection device. Figure 1As shown, the end of the lead screw 120 extends from the side of the mounting frame 110, and a main transmission wheel 181 and a slave transmission wheel 182 are respectively installed on each pair of lead screws 120. A transmission connection device (such as a pulley, a chain, etc.) is provided between the driving device 130, the main transmission wheel 181, and the slave transmission wheel 182, so that they can coordinate under certain conditions. Specifically, the driving device 130 can drive the main transmission wheel 181, and the main transmission wheel 181 can drive the slave transmission wheel 182. The main transmission wheel 181 and the slave transmission wheel 182 can be used to synchronously drive a pair of lead screws 120 to move, so that the collimation block 143 moves, and the range of the ray field can be adjusted.

[0047] Figure 2 The structural block diagram of a modular control device 200 according to an embodiment of the present disclosure is schematically shown.

[0048] like Figure 2 The modular control device 200 shown is used to control the outer collimator 100 of the non-destructive testing accelerator. For example, the modular control device 200 is communicatively connected to the outer collimator 100 to transmit a control signal to the outer collimator 100 .

[0049] In some embodiments, the modular control device 200 may include a base plate unit 210, a control unit 220, and N motor power units 230. The base plate unit 210 includes a base plate 211; the control unit 220 is mounted on the base plate 211; the N motor power units 230 are mounted on the base plate 211, each motor power unit 230 is used to drive at least one motor of the outer collimator 100 in response to a signal from the control unit 220, and N is an integer greater than or equal to 1; wherein the control unit 220 and the motor power unit 230 are independent modular units.

[0050] Exemplarily, the base plate 211 serves as a substrate to provide a mounting function for the control unit 220 and the motor power unit 230. The base plate unit 210, the control unit 220 and the motor power unit 230 together constitute the main control unit of the external collimator 100, which mainly carries the functions of core logic calculation and control, power supply, motor drive and communication. In addition, the control unit 220 and the motor power unit 230 are independent modules with clear functions, and each unit can be disassembled, maintained and replaced separately, which is conducive to improving maintenance efficiency and reducing costs.

[0051] Exemplarily, the control unit 220 is responsible for receiving external input signals or internal logic instructions, and according to these signals, determines how to adjust the irradiation field of the outer collimator 100. The motor power unit 230 receives signals from the control unit 220, and according to these signals, drives the motor of the outer collimator 100, and changes the irradiation field by driving the motor.

[0052] According to the embodiment of the present disclosure, the control device of the external collimator 100 is modularly designed to split each unit into independent modular units. Effective isolation is achieved between the control unit 220 and the motor power unit 230, which can more conveniently and efficiently realize fault location and later maintenance and replacement.

[0053] Figure 3 The structure block diagram of the bottom plate unit 210 according to an embodiment of the present disclosure is schematically shown. Figure 4 The figure schematically shows a connection diagram of the control chip 222 , the first circuit 213 and the first terminal 212 according to an embodiment of the present disclosure.

[0054] In some embodiments, the base unit 210 further includes a connector. The connector is installed on the base 211; wherein the control unit 220 and each motor power unit 230 are pluggably installed on the base 211 through matching connectors.

[0055] Reference Figure 3 , wherein the dotted box marks the installation area of ​​the control unit 220 and the motor power unit 230. The connector refers to a connecting element used to achieve electrical connection. The control unit 220 can be configured with a first connector 221, which is electrically connected through the connector on the bottom plate 211 in the corresponding installation area. Each motor power unit 230 can be configured with a second connector 231, which is also electrically connected through the connector on the bottom plate 211 in the corresponding installation area.

[0056] According to an embodiment of the present disclosure, the control unit 220 and each motor power unit 230 are pluggably installed on the base plate 211 through matching connectors, respectively, so that the control unit 220 or the motor power unit 230 can be quickly replaced.

[0057] Preferably, continue to refer to Figure 2 and Figure 3 Two motor power units 230 can be installed on the base plate 211, which can realize the control of a larger number of motors while achieving a higher degree of integration under the premise of modular design.

[0058] Specifically, in the related art, since the control unit 220 and the motor power unit 230 are integrated circuits and integrated on the same circuit board, the control unit 220 and the motor power unit 230 are in a one-to-one correspondence. When the number of motors is greater, multiple sets of control units 220 and motor power units 230 are added accordingly, which not only affects each other between the units, but also increases the cost, which is contrary to the concept of increasingly miniaturized X-ray heads. In the modular control device 200 provided in the present disclosure, multiple modular motor power units 230 can be installed on the base plate 211, realizing a one-to-many correspondence between the control unit 220 and the motor power unit 230, which not only realizes effective isolation between units, but also reduces costs and overall volume.

[0059] In some embodiments, the control unit 220 includes a control chip 222. The control chip 222 is provided with at least one first interface 2221, and the first interface 2221 is used for transmitting input and output signals between the control chip 222 and the outside.

[0060] In some embodiments, the bottom plate unit 210 further includes a first circuit 213 and a first terminal 212. The first circuit 213 is laid on the bottom plate 211 and connected to at least one first interface 2221; the first terminal 212 is arranged on the bottom plate 211 and connected to the first circuit 213, wherein the first terminal 212 is used to connect part or all of the external input and output signals.

[0061] For example, refer to Figure 4 , the control chip 222 can adopt the control architecture of FPGA+ARM (Advanced RISC Machine), or a separate FPGA control chip 222 can be used. The first interface 2221 can transmit various limit signals of the external collimator 100 or the laser switch 241 signal, etc. The first interface 2221 for external input and output in the FPGA or ARM can be extended to the base plate 211, and then all led out through the isolation circuit (i.e., the first circuit 213) of the base plate 211. The external input and output signals can be directly connected through the first terminal 212 of the base plate 211, so that the external input and output signals are more effectively isolated from the main control chip (i.e., the control chip 222).

[0062] According to the embodiments of the present disclosure, the control chip 222 is more susceptible to interference and radiation than other chips, so in the scenario where the control chip 222 needs to be replaced frequently, the modular design provided by the present disclosure can achieve separate replacement. In addition, when the system is upgraded, only the core control board can be upgraded on the basis of retaining the baseboard 211, or minor changes can be made to the baseboard 211. Compared with the original integrated design, the modular design is safer and more convenient, and the workload of later upgrades and maintenance is smaller.

[0063] Figure 5 The structural block diagram of the motor power unit 230 according to an embodiment of the present disclosure is schematically shown. Figure 6 A schematic diagram of the opening of the motor power unit 230 according to an embodiment of the present disclosure is schematically shown. Figure 7 The schematic diagram schematically shows the connection between the control chip 222, the second circuit 214 and the motor driving chip 232 according to an embodiment of the present disclosure.

[0064] In some embodiments, each motor power unit 230 includes M motor driver chips 232, each motor driver chip 232 is used to drive at least one motor of the external collimator 100, and M is an integer greater than or equal to 1; each motor driver chip 232 is provided with at least one second interface 2321, and the second interface 2321 is used to transmit the signal of the control unit 220, and the motor driver chip 232 is used to drive at least one motor of the external collimator 100 in response to the signal of the control unit 220.

[0065] In some embodiments, the base unit 210 further includes a second circuit 214 disposed on the base 211 . The second circuit 214 is used to transmit a signal of the control unit 220 to the second interface 2321 .

[0066] In some embodiments, each motor power unit 230 further includes a motor interface 234 and a motor ground wire. The motor interface 234 is connected to at least one motor of the driven outer collimator 100; the motor ground wire is connected to the motor interface 234, and a specific area of ​​the motor ground wire is covered by electromagnetic shielding material.

[0067] For example, refer to Figure 5~Figure 7 Considering that the outer collimator 100 is close to the main beam of the ray, the selection of the motor should take into account the radiation resistance performance. The motor in the non-destructive testing system can be a stepper motor. Accordingly, the type of chip used in the motor driving chip 232 can be a stepper motor driving chip. The motor power unit 230 is connected to the base plate 211 through the second connector 231 and the matching connector on the base plate 211. Figure 5 and Figure 6 The second connector 231 shown can be a double-row pin.

[0068] Reference Figure 7The bottom plate 211 leads out the output port in the control chip 222 through the first circuit 213, and the second circuit 214 is reasonably wired on the bottom plate 211, and then the control signal of the control chip 222 is introduced into the circuit of the motor power unit 230 through the double-row pins connected between the bottom plate 211 and the motor power unit 230. The introduced control signal passes through the level conversion circuit 236 and the signal isolation circuit 237, and finally reaches the input signal end of the driver chip, such as the second interface 2321. Finally, the motor driver chip 232 receives the control signal of the control chip 222 and drives the corresponding one or more stepper motors.

[0069] The level conversion circuit 236 is used to match signals of different voltage levels to ensure that the signals can be transmitted between circuits in different voltage domains, that is, to convert the control signal from the control chip 222 into a signal that can be received by the motor drive chip 232. The signal isolation circuit 237 is used to electrically isolate two circuits or systems to prevent current from flowing directly, thereby protecting the circuit from damage and reducing electromagnetic interference.

[0070] In some embodiments, the first circuit 213 may be wired in the installation area of ​​the control unit 220, and the second circuit 214 may be wired in the installation area of ​​the motor power unit 230, and the two circuits may be electrically connected.

[0071] According to the embodiments of the present disclosure, under normal circumstances, the motor driver chip 232 has a large current and a large switching noise, and is more likely to generate high-frequency interference than the control chip 222. In this way, through the switching and physical isolation of the base plate 211, the interference and damage of the driver chip to the main control chip can be greatly reduced.

[0072] Reference Figure 5 and Figure 6 In the motor power unit 230, there will also be a power supply interface 235 for input and a motor interface 234 for driving the motor. The ground wire design for the motor in this unit adopts a large area of ​​electromagnetic shielding material, such as copper material, which can greatly avoid electromagnetic interference in the motor drive. It can be seen that this design method makes the power supply of the motor power unit 230 completely independent of the power supply of other units and the entire control device, and they do not interfere with each other, which greatly improves the stability of the control system.

[0073] Continue to refer to Figure 6 In addition to connectors, the motor power unit 230 and the base plate 211 can also be connected by screws such as Figure 6 The four through holes numbered 1, 2, 3, and 4 are mechanically connected to the bottom plate 211.

[0074] In some embodiments, considering the motor driving the outer collimator 100, the current of the motor will not exceed 3.5A in most cases. Therefore, the heat dissipation method of the driver chip is also a miniaturized design, and the number of heat sinks is consistent with the number of motor driver chips 232. Figure 6 The through holes numbered 5 and 6 are the heat sink mounting holes for the motor driver chip 2321. Figure 6 The through holes numbered 7 and 8 are the heat sink mounting holes of the chip 2. The heat sink of the motor driving chip 232 can be a heat dissipation metal sheet, and the sheet can be coated with thermal conductive silicone grease.

[0075] During drive control, the drive motor on the outer collimator 100 does not move all the time. The motor can maintain its position after it is in place. The motor is started and under heavy load. Through the control algorithm, the motor can output a large current at startup and a small current during stable operation, so the heat sink can be reasonably miniaturized. For example, the size of the entire motor power unit 230 is 76mm×62mm (example), which takes into account heat dissipation and retains a large driving capacity while achieving miniaturization.

[0076] In some embodiments, each motor power unit 230 further includes a phase excitation dial switch 233. The phase excitation dial switch 233 is coupled to the M motor driver chips 232, and the phase excitation dial switch 233 is used to select a matching phase excitation mode according to the motor driven by each motor driver chip 232.

[0077] The driver chip package in the power unit can be a plug-in type or a patch type. According to the current, number of phases, position accuracy of the driven motor, or the usage habits, the familiar stepper motor driver chip 232 can be replaced. Each driver chip corresponds to a stepper motor, so two motor driver chips 232 can be arranged on a motor power unit 230, so that each motor power unit 230 can drive two stepper motors. The phase excitation dial switch 233 can select different phase excitation modes for the driver chip according to the different driving stepper motors. Common excitation modes include: 2 phases, 1-2 phases, 2W1-2 phases, 4W1-2 phases, etc., which can be combined and selected through the dial switch. Taking the original step angle of the stepper motor 1.8° as an example, if 4W1-2 phase excitation is selected, the position accuracy can reach up to about 0.1 degrees, which fully meets the positioning requirements of the collimator 100 in non-destructive testing.

[0078] In some embodiments, the base unit 210 further includes a first power supply and N second power supplies. The first power supply is installed on the base 211 and is used to supply power to the control unit 220; the N second power supplies are installed on the base 211 and are used to supply power to the N motor power units 230 in a one-to-one correspondence; wherein the first power supply and any second power supply are isolated from each other and wired in layers, and / or any two second power supplies are isolated from each other and wired in layers.

[0079] In some embodiments, the base unit 210 further includes a third power supply and a fourth power supply. The third power supply is installed on the base 211 and is used to supply power to the input and output interfaces on the base 211; the fourth power supply is installed on the base 211 and is used to provide overall power supply to the modular control device 200; wherein the first power supply, the second power supply, the third power supply and the fourth power supply are isolated from each other and are wired in layers.

[0080] The base plate 211 serves as a carrier platform for the control unit 220, the motor power unit 230 and other unit modules, that is, as a physical support for loading each module, and also provides various DC power supplies required by other sub-modules, such as the 3.3V power supply (i.e., the first power supply) required by the control chip 222, the 5V power supply (i.e., the second power supply) for controlling the motor power unit 230, the 5V power supply (i.e., the third power supply) for input and output, and the 24V power supply (i.e., the fourth power supply) for total power supply or input and output. These power supplies need to be isolated from each other and wired in layers.

[0081] In addition, in addition to providing the necessary power supply, the base plate 211 also reserves input and output I / O interfaces, a network port for network communication, and a serial port for serial communication, so that users can choose different communication scenarios according to the occasion when controlling.

[0082] The modular design scheme provided by the present disclosure completely separates the high-current driving circuit (such as a 24V power supply corresponding to the total power supply) from the low-current control circuit (such as a first power supply corresponding to 3.3V and a second power supply corresponding to 5V), and is easy to replace, which greatly improves the high reliability and maintenance convenience of the modular control device 200 of the outer collimator 100.

[0083] In some embodiments, reference Figure 2~Figure 7 Considering the mechanical structures of different external collimators 100, some external collimators 100 require four motor drives, while others only require two motor drives. Therefore, two pluggable motor power units 230 areas are expanded on the bottom plate 211, that is, when two motor power units 230 are installed on the bottom plate 211, the entire control device can control four stepper motors at the same time; when only one motor power unit 230 is used, two stepper motors can be controlled.

[0084] Figure 8The functional layout diagram of the operation box 240 according to the embodiment of the present disclosure is schematically shown.

[0085] In some embodiments, the modular control device 200 further includes an operation box 240. The operation box 240 is independent of the outer collimator 100; the operation box 240 is configured to transmit data to the control unit 220 in the form of a serial data bus in response to being operated by a user, and the control unit 220 is configured to generate a signal for controlling the outer collimator 100 in response to the data.

[0086] The change in the irradiation field angle of the external collimator 100 requires a human-machine interface to realize control. In the related art, the angle value of the external collimator 100 is displayed on the outer shell panel of the X-ray head. There are two control modes: remote mode and local mode. The remote mode is used for control operations when the beam is emitted. The local mode is used for control operations when the beam is stopped. The switch for this control operation is also located on the outer panel of the external collimator 100, so that the opening and closing operation of the external collimator 100 also needs to be operated through the dip switch on the X-ray head panel. When the X-ray head needs to be raised to a certain height and pitched to a certain angle, people operating locally need to climb to work, which is inconvenient and increases the risk of operation.

[0087] According to an embodiment of the present disclosure, an operating box independent of the external collimator is provided, which eliminates the need for high-altitude operations during local control operations, thereby reducing operational risks.

[0088] In some embodiments, the operation box 240 includes a laser switch 241 , wherein when the laser switch 241 is operated by a user, the control unit 220 is configured to generate a corresponding switch signal of a calibration laser, and the calibration laser is used to calibrate the center point of the irradiation field of the external collimator 100 .

[0089] Calibration lasers are also required in non-destructive testing. Calibration lasers are lasers in two directions, horizontal and vertical, forming a cross. The intersection indicates the target point of the X-ray. The laser intersection is also the center point of the field of view of the external collimator 100. In the related art, the laser calibration circuit is a discrete component dispersed in the frame of the X-ray head, and the laser switch button is also located on the outer panel of the external collimator 100.

[0090] In this embodiment, the individual discrete components dispersed in the frame of the X-ray head are eliminated. The laser switch is placed in the operation box 240, and the laser can be turned on and off by directly switching the switch without adding additional circuits. In addition, when the operator forgets to turn off the laser power supply, the laser can be automatically turned off with a delayed delay, thereby protecting the laser from being damaged or having its service life shortened due to long-term overheating.

[0091] In some embodiments, the outer collimator 100 includes S collimation blocks 143, the S collimation blocks 143 are used to collimate rays, S is an integer greater than or equal to 1, and the operation box 240 includes a display area 242 and / or a button area 243. The display area 242 is used to display the state parameters of each collimation block 143; and / or the button area 243 includes K groups of buttons, each group of buttons includes at least one button, wherein each collimation block 143 has a corresponding group of buttons in the button area 243, and K is an integer greater than or equal to S.

[0092] Return to reference Figure 1 The collimation assembly 140 may include a first group of collimators 141 and a second group of collimators 142, both of which are driven by the lead screw 120 and the driving device 130. The first group of collimators 141 has two collimators 143 that can be driven by the lead screw 120 to move along a first direction, and the second group of collimators 142 has two collimators 143 that can be driven by the lead screw 120 to move along a second direction, wherein the first direction is perpendicular to the second direction. Figure 1 As shown, the first direction can be a horizontal direction, and the second direction can be a vertical direction, that is, the two collimating blocks 143 included in the first group of collimating parts 141 can move in the horizontal direction, and the two collimating blocks 143 included in the second group of collimating parts 142 can move in the vertical direction, thereby satisfying the need to arbitrarily adjust the irradiation field in the vertical and horizontal directions.

[0093] The first group of collimators 141 and the second group of collimators 142 are sequentially arranged along the irradiation direction of the accelerator, and the rays will pass through between the first group of collimators 141 and the second group of collimators 142. Therefore, the four collimating blocks 143 included in the first group of collimators 141 and the second group of collimators 142 can reciprocate in the area up, down, left and right respectively with the accelerator rays as the center point, so that the movement combination of the four collimating blocks 143 can arbitrarily define the ray field in a two-dimensional area.

[0094] In the modular control device 200 provided by the present disclosure, the functions of angle display, opening and closing operation and laser switch 241 are separated from the X-ray head to form a separate operation box 240. The operation box 240 can be handheld and operated by the user.

[0095] The handheld operating box 240 can be used to operate the angle of the external collimator 100 close to but within a safe distance from the X-ray head, thereby achieving the function of changing the size of the irradiation field. Figure 8The layout diagram of the circuit board of the handheld operation box 240 is shown. The display area 242 has 4 LED digital displays, which correspond to the four directions of opening and closing of the external collimator 100, namely, up, down, left, and right. The displayed angle value can be accurate to one decimal place. The key area 243 has 9 buttons. The top four buttons are: up open, down open, left open, and right open; the middle four buttons are: up close, down close, left close, and right close; the bottom button is the stop button. All the buttons are effective buttons for inching, that is, the action command will be executed when the button is pressed and lifted. After the "up open" button is pressed effectively, the vertical upper tungsten block of the external collimator 100 will move upward. If the "stop" button is pressed at this time, the tungsten block will stop at the position it moves to at this time. When it reaches the limit position, it will hit the limit switch, and the system will automatically stop the motor movement. The same applies to other buttons.

[0096] In some embodiments, the modular control device 200 further includes a box body 250 , wherein the base unit 210 , the control unit 220 , and N motor power units 230 are installed in the box body 250 ; a connecting cable is used to connect the operating box 240 to the box body 250 .

[0097] Reference Figure 2 The entire external collimator 100 control system can be divided into two large modular units: the base unit 210, the control unit 220 and the motor power unit 230 together constitute the main control unit and the operation box 240 unit of the external collimator 100. The two units are connected by a multi-core cable (i.e., a connecting cable) and an aviation plug. The base unit 210, the control unit 220 and the motor power unit 230 are encapsulated in a metal shielded box body 250. In some embodiments, the box body 250 can be equipped with a cooling fan. There are also multiple aviation plugs on the box body 250 for connecting the motor that drives the tungsten block of the external collimator 100. In addition, the input and output signals on the base plate 211, the power supply of the motor power unit 230, and the motor interface 234 are transferred through the aviation plug on the box body 250, which can be plug-and-play and easy to replace.

[0098] like Figure 2 As shown in the overall schematic diagram. The handheld operation box 240 and the box body 250 are connected and plugged in and out through an aviation plug, which is plug and play. The aviation plug is electrically connected to the internal bottom plate 211. The connecting cable is a multi-core shielded double-stranded cable. In some embodiments, the driving control chip 222 of the LED display and keyboard of the hand operation box is CH452. One CH452 chip can drive up to 8 8-segment digital tubes at the same time. Considering the application requirements, two CH452 chips can be installed to drive 12 8-segment digital tubes. The two CH452s and the control chip 222 are serial data communications, and the line length can reach 20 meters.

[0099] Reference Figure 1 to Figure 8As mentioned above, the entire modular control device 200 can be divided into a main control unit module and a handheld operation box 240 unit module, and the main control unit module can be divided into a base unit 210, a control unit 220, and N motor power units 230. Effective isolation is achieved between the modules, and effective electromagnetic compatibility can be achieved while conveniently plugging and replacing hardware. In particular, the motor power unit 230 is miniaturized while ensuring performance. Each unit is also equipped with a fault indicator light, which can quickly locate which subunit has a problem during maintenance, making replacement and maintenance convenient and greatly improving work efficiency.

[0100] The control device of the outer collimator 100 is usually near the X-rays. After a long period of X-ray scattering, some core components of the control device need to be replaced regularly. In the related art, the controller of the outer collimator 100 in the traditional mode has the prominent problem of inconvenient replacement. The modular control device 200 provided by the present disclosure can solve this series of problems well, and is easy to operate, take, maintain and replace.

[0101] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways, even if such combinations and / or combinations are not explicitly described in the present disclosure. In particular, the features described in the various embodiments and / or claims of the present disclosure may be combined and / or combined in a variety of ways without departing from the spirit and teachings of the present disclosure. All of these combinations and / or combinations fall within the scope of the present disclosure.

[0102] The embodiments of the present disclosure are described above. Although each embodiment is described above separately, it does not mean that the measures in each embodiment cannot be used in combination advantageously. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, a person skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A modular control device for controlling an external collimator of a non-destructive testing accelerator, It is characterized in that The modular control device comprises: A base plate unit, comprising a base plate; A control unit, mounted on the base plate; N motor power units, mounted on the base plate, each of the motor power units being used to drive at least one motor of the outer collimator in response to a signal from the control unit, and N being an integer greater than or equal to 1; Wherein, the control unit and the motor power unit are independent modular units.

2. The modular control device according to claim 1, It is characterized in that The base plate unit also includes: A connector installed on the bottom plate; Wherein, the control unit and the motor power unit are independent modular units including: The control unit and each of the motor power units are pluggably mounted on the base plate through matching connectors.

3. The modular control device according to claim 1, It is characterized in that The control unit comprises: The control chip is provided with at least one first interface, and the first interface is used for transmitting input and output signals between the control chip and the outside.

4. The modular control device according to claim 3, It is characterized in that The base plate unit also includes: A first circuit, laid on the bottom board and connected to the at least one first interface; The first terminal is arranged on the bottom plate and connected to the first circuit, wherein the first terminal is used to connect to part or all of the external input and output signals.

5. The modular control device according to any one of claims 1 to 4, It is characterized in that Each of the motor power units comprises: M motor driving chips, each of which is used to drive at least one motor of the outer collimator, and M is an integer greater than or equal to 1; Each of the motor driving chips is provided with at least one second interface, and the second interface is used to transmit the signal of the control unit. The motor driving chip is used to drive at least one motor of the outer collimator in response to the signal of the control unit.

6. The modular control device according to claim 5, It is characterized in that The base plate unit also includes: The second circuit is laid on the bottom board, and the second circuit is used to transmit the signal of the control unit to the second interface.

7. The modular control device according to claim 5, It is characterized in that Each of the motor power units also includes: The phase excitation dial switch is coupled to the M motor driving chips, and the phase excitation dial switch is used to select a matching phase excitation mode according to the motor driven by each motor driving chip.

8. The modular control device according to claim 5, It is characterized in that Each of the motor power units also includes: A motor interface, connected to at least one motor of the outer collimator being driven; A motor ground wire is connected to the motor interface, and a specific area of ​​the motor ground wire is covered by an electromagnetic shielding material.

9. The modular control device according to claim 1, It is characterized in that The base plate unit also includes: A first power supply, mounted on the base plate, for supplying power to the control unit; N second power supplies are installed on the base plate and are used to supply power to the N motor power units in a one-to-one correspondence; The first power source and any one of the second power sources are isolated from each other and wired in layers, and / or any two of the second power sources are isolated from each other and wired in layers.

10. The modular control device according to claim 9, It is characterized in that The base plate unit also includes: A third power supply, installed on the base plate, for supplying power to the input and output interfaces on the base plate; a fourth power supply, mounted on the base plate, for providing overall power supply to the modular control device; The first power supply, the second power supply, the third power supply and the fourth power supply are isolated from each other and wired in layers.

11. A modular control device according to any one of claims 1 to 4, 6 to 10, It is characterized in that The modular control device also includes: an operation box, independent of the outer collimator; The operation box is configured to transmit data to the control unit in the form of a serial data bus in response to being operated by a user, and the control unit is configured to generate a signal for controlling the outer collimator in response to the data.

12. The modular control device according to claim 11, It is characterized in that The operation box comprises: A laser switch, wherein when the laser switch is operated by the user, the control unit is configured to generate a corresponding switch signal of a calibration laser, and the calibration laser is used to calibrate the center point of the irradiation field of the external collimator.

13. The modular control device according to claim 11, It is characterized in that The external collimator includes S collimation blocks, and the collimation blocks are used to collimate rays, where S is an integer greater than or equal to 1. The operation box comprises: A display area is used to display the status parameters of each collimation block; and / or, The key area includes K groups of keys, each group of keys includes at least one key, wherein each of the alignment blocks has a corresponding group of keys in the key area, and K is an integer greater than or equal to S.

14. The modular control device according to claim 11, It is characterized in that The modular control device also includes: A box body, wherein the base plate unit, the control unit, and N motor power units are installed in the box body; A connecting cable is used to connect the operation box with the box body.

15. A non-destructive testing accelerator, It is characterized in that include: External collimator; as well as A modular control device for the outer collimator according to any one of claims 1 to 14.

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